Arbitrage & Sure Bet Calculator
When the best prices across bookmakers add up to under 100%, you can back every outcome and still come out ahead. This tool tells you how much to put on each.
Sure Bet Splitter
Add the top price for each outcome and a total stake to build the arb
Spotting a genuine arb
Take the best price for every outcome in one market, even if each comes from a different bookmaker. Add up 1 ÷ each price. If the total is under 1, or under 100% as a book, a correctly split stake returns more than you put in whatever the result.
Two-way: over/under 2.5 goals
Over at 2.08 with one firm, under at 2.02 with another. That's 48.08% + 49.50% = 97.58%. Put £98.54 on the over and £101.46 on the under, £200 in total, and either side returns about £204.95. That's a 2.48% profit, and the scoreline is irrelevant.
Three-way: the match result
Home 2.25, draw 3.55 and away 3.80 across three books totals 98.93%. With £300 the split is £134.78, £85.42 and £79.80, and every result returns around £303.25: a 1.08% edge.
Pick a staking plan
- •Split. Level profit on every outcome. The default, and the purest arb.
- •Fav Wins. The shortest price carries all the profit; the others just hand your money back.
- •Fav Loses. The favourite only breaks even and the bigger prices carry the profit. Use it when the live stats make you doubt the favourite.
- •Smooth. Rounds each stake to a tidy figure. £95 looks like a punter; £97.36 looks like a spreadsheet. You give up a few pence of the guarantee.
Where arbs go wrong
- •They vanish fast. A goal or a team-news leak shuts an arb in seconds. Recheck every price right before you stake.
- •Rules must match. Make sure each bookmaker settles the market the same way, whether that's 90 minutes only or how an abandoned match is treated.
- •Limits shrink the lot. If one bookie caps your stake, the whole split has to scale down to fit.
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